Chlamydial genital infection in Ibadan, Nigeria. A seroepidemiological survey.

Sera from patients attending a sexually transmitted diseases (STD) clinic, a family planning clinic, and an antenatal clinic in Ibadan, Nigeria, as well as from male blood donors from the same area were tested for the presence of type specific antichlamydial antibodies using a modified micro-immunofluorescence test. Among men and women attending the STD clinic the exposure rates to Chlamydia trachomatis serotypes D to K (genital pathogens) were 18.7% and 26.7% respectively. Antibody titres suggesting active disease in these men and women were found in 11.8% and 22.7% respectively. The highest rate of exposure (35%) was among women attending the family planning clinic; of these women 25% had antibody suggesting active disease. Titres of IgG antibody in this study were similar to those found among men and women with chlamydial genital infections in the United Kingdom. Antibodies to serotypes D to K were also detected in 10.3% of women attending an antenatal clinic and in 9.9% of male blood donors. The prevalence of antibodies to C trachomatis serotypes A to C and lymphogranuloma venereum serotypes was low. These results suggest that the prevalence of chlamydial genital infections in Ibadan, both among STD patients and especially among those individuals not seeking treatment (family planning and antenatal clinic patients), is high. Since serious sequelae can follow chlamydial genital infections it is imperative to carry out further investigations in this area.